console.log("我是a模块");

let a = 10;
let b = 20;

// 导出 
//1. export defalut a   2. export {a as defalut}
// export default a;  // 自定义变量接收 
// export {a as default};
export default b;


// 给变量起别名导出 
export {a as mya};
export {b as myb};

